package com.ktkj.init.utils;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;


/**
 * The type Http utils.
 *
 * @author :yanlixiong
 * @date :2021-12-13 17:07:29
 */
@Slf4j
public class HttpUtils {

    /**
     * get请求
     *
     * @return
     */
    public static String doGet(String url) {
        try {
            HttpClient client = HttpClientBuilder.create().build();
            HttpGet request = new HttpGet(url);
            HttpResponse response = client.execute(request);
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                return EntityUtils.toString(response.getEntity());
            }
        } catch (IOException e) {
            log.error("doGet|", e);
        }
        return null;
    }

    /**
     * put请求
     *
     * @return
     */
    public static String doPut(String url) {
        try {
            HttpClient client = HttpClientBuilder.create().build();
            HttpPut request = new HttpPut(url);
            HttpResponse response = client.execute(request);
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                return EntityUtils.toString(response.getEntity());
            }
        } catch (IOException e) {
            log.error("doGet|", e);
        }
        return null;
    }


    /**
     * delete请求
     *
     * @return
     */
    public static String doDelete(String url) {
        try {
            HttpClient client = HttpClientBuilder.create().build();
            HttpDelete request = new HttpDelete(url);
            HttpResponse response = client.execute(request);
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                return EntityUtils.toString(response.getEntity());
            }
        } catch (IOException e) {
            log.error("doGet|", e);
        }
        return null;
    }

    /**
     * post请求(用于key-value格式的参数)
     *
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, Map params) {
        BufferedReader in = null;
        try {
            HttpClient client = HttpClientBuilder.create().build();
            HttpPost request = new HttpPost();
            request.setURI(new URI(url));
            if (MapUtils.isNotEmpty(params)) {
                List<NameValuePair> nvps = new ArrayList<NameValuePair>();
                for (Iterator iter = params.keySet().iterator(); iter.hasNext(); ) {
                    String name = (String) iter.next();
                    String value = String.valueOf(params.get(name));
                    nvps.add(new BasicNameValuePair(name, value));
                }
                request.setEntity(new UrlEncodedFormEntity(nvps));
            }
            HttpResponse response = client.execute(request);
            int code = response.getStatusLine().getStatusCode();
            if (code == 200) {
                in = new BufferedReader(new InputStreamReader(response.getEntity()
                        .getContent(), "utf-8"));
                StringBuffer sb = new StringBuffer("");
                String line = "";
                String lineSeparator = System.getProperty("line.separator");
                while ((line = in.readLine()) != null) {
                    sb.append(line).append(lineSeparator);
                }
                in.close();
                return sb.toString();
            } else {
                log.error("状态码|{}", code);
            }
        } catch (Exception e) {
            log.error("doPost|", e);
        }
        return null;
    }

    /**
     * post请求（用于请求json格式的参数）
     *
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, String params) {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        try {
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-Type", "application/json");
            if (StringUtils.isNotBlank(params)) {
                String charSet = "UTF-8";
                StringEntity entity = new StringEntity(params, charSet);
                httpPost.setEntity(entity);
            }
            response = httpclient.execute(httpPost);
            StatusLine status = response.getStatusLine();
            int state = status.getStatusCode();
            if (state == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                return EntityUtils.toString(responseEntity);
            } else {
                log.error("请求返回:{}({})", state, url);
            }
        } catch (Exception e) {
            log.error("doPost|", e);
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}
